My implication is that Facebook will solve this, not by disallowing access to NY teens, but by incentivizing NY teens and their parents to opt into the exact type of addictive feed that they currently have, and in the meantime falling back to non-user-specific recommendations. Also, it appears that a platform can still show content from users/channels that a minor user has
explicitly subscribed to, without that counting as an addictive feed.
It's a very de-fanged law, but it's an iterative step in the right direction.